<template>
    <div>
      <!--面包屑导航区域-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>

      <!--卡片区域-->
      <el-card>
        <!--提示区域-->
        <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
        <!--步骤条区域-->
        <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="完成"></el-step>
        </el-steps>
        <!--tag标签 基本信息区域-->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
          <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
            <el-tab-pane label="基本信息" name="0">
              <el-form-item label="商品名称" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="goods_price">
                <el-input v-model="addForm.goods_price" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="goods_weight">
                <el-input v-model="addForm.goods_weight" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品数量" prop="goods_number">
                <el-input v-model="addForm.goods_number" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类" prop="goods_cat">
                <el-cascader v-model="addForm.goods_cat" :options="catelist" :props="cateProps" @change="handleChange" clearable></el-cascader>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
              <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                <el-checkbox-group v-model="item.attr_vals">
                  <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                </el-checkbox-group>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
              <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
              <!--action图片要上传的图片地址-->
              <el-upload :action="uploadURL" :headers="headerObj" :on-preview="handlePreview" :on-remove="handleRemove"
                         list-type="picture" :on-success="handleSuccess">
                <el-button size="small" type="primary">点击上传</el-button>
              </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>
              <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
            </el-tab-pane>
          </el-tabs>
        </el-form>
      </el-card>

      <!--图片预览对话框-->
      <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
        <img :src="previewPath" class="previewImg">
      </el-dialog>
    </div>
</template>

<script>
  import _ from 'lodash'
    export default {
        data() {
            return {
              //标签页动态绑定
              activeIndex:'0',
              //添加表单数据
              addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                goods_cat:[],
                //图片上传零时路径
                pics:[],
                //商品详情描述
                goods_introduce:'',
                attrs:[]
              },
              //添加表单验证规则
              addFormRules:{
                goods_name:[
                  { required: true, message:'请输入商品名称', trigger:'blur'}
                ],
                goods_price:[
                  { required: true, message:'请输入商品价格', trigger:'blur'}
                ],
                goods_weight:[
                  { required: true, message:'请输入商品重量', trigger:'blur'}
                ],
                goods_number:[
                  { required: true, message:'请输入商品数量', trigger:'blur'}
                ],
                goods_cat:[
                  { required: true, message:'请选择商品分类', trigger:'blur'}
                ]
              },
              //商品分类列表
              catelist:[],
              //级联选择器props属性设置
              cateProps: {
                expandTrigger: 'hover',
                label:'cat_name',
                value:'cat_id',
                children:'children'
              },
              //动态参数列表
              manyTableData:[],
              //静态属性列表
              onlyTableData:[],
              //上传图片URL地址
              uploadURL:'http://39.97.126.50:8888/api/private/v1/upload',
              //图片上传请求头
              headerObj:{
                Authorization:window.sessionStorage.getItem('token')
              },
              //图片路径赋值
              previewPath:'',
              //图片预览对话框
              previewVisible:false,
              //服务器IP
              IP:'http://39.97.126.50:8888/'
            }
        },
        created() {
          this.getCateList()
        },
        methods: {
          //获取所有商品分类
          async getCateList(){
            const {data:res}=await this.$http.get('categories')
            if (res.meta.status!==200) return this.$message.error('获取分类数据失败！')
            this.catelist=res.data
          },
          //级联选择器变化触发函数 只准选中三级
          handleChange(){
            if(this.addForm.goods_cat.length!==3){
              this.addForm.goods_cat=[]
            }
          },
          //tag标签切换前判断是否填写某些属性 否则不跳转
          beforeTabLeave(activeName,oldActiveName){
            if (oldActiveName==='0' && this.addForm.goods_cat.length!==3){
              this.$message.error('请先选择商品分类！')
              return false
            }
          },
          //tag点击事件
          async tabClicked(){
            //访问动态参数面板 则请求参数标签
            if (this.activeIndex==='1'){
              const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
              if (res.meta.status!==200) return this.$message.error('获取动态属性数据失败！')
              res.data.forEach(item=>{
                item.attr_vals=
                  item.attr_vals.length ===0 ?
                    [] : item.attr_vals.split(' ')
              })
              this.manyTableData=res.data
            }
            else if (this.activeIndex==='2'){
              const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
              if (res.meta.status!==200) return this.$message.error('获取静态属性数据失败！')
              this.onlyTableData=res.data
            }
          },
          //处理图片预览
          handlePreview(file){
            this.previewPath=this.IP+file.response.data.tmp_path
            this.previewVisible=true
          },
          //处理移除图片操作
          handleRemove(file){
            //获取图像零时路径
            const filePath=file.response.data.tmp_path
            const i=this.addForm.pics.findIndex(x=>x.pic===filePath)
            this.addForm.pics.splice(i,1)
          },
          //监听图片上传成功事件
          handleSuccess(response){
            const picInfo={pic:response.data.tmp_path}
            this.addForm.pics.push(picInfo)
          },
          //添加商品
          add(){
            this.$refs.addFormRef.validate(async valid=>{
              if (!valid) return this.$message.error('请填写必要的表单项！')
              //合法添加执行业务

              //处理动态参数
              this.manyTableData.forEach(item=>{
                const newInfo={
                  attr_id: item.attr_id,
                  attr_value: item.attr_vals.join(' ')
                }
                this.addForm.attrs.push(newInfo)
              })
              //处理静态属性
              this.onlyTableData.forEach(item=>{
                const newInfo={
                  attr_id: item.attr_id,
                  attr_value: item.attr_vals
                }
                this.addForm.attrs.push(newInfo)
              })
              //数组返回，的字符串
              //lodash cloneDeep(obj) 深拷贝
              const form=_.cloneDeep(this.addForm)
              form.goods_cat=form.goods_cat.join(',')
              //发起请求 添加商品
              const {data:res}=await this.$http.post('goods',form)
              if (res.meta.status!==201) return this.$message.error('商品添加失败！')
              this.$message.success('商品添加成功！')
              this.$router.push('/goods')
            })
          }
        },
      computed: {
        //当前选中的三级ID
        cateId() {
          if (this.addForm.goods_cat.length === 3) return this.addForm.goods_cat[2]
          return null
        }
      }
    }
</script>

<style lang="less" scoped>
.el-steps{
  margin: 15px 0;
}

.el-step__title{
  font-size: 13px;
}

.el-checkbox{
  margin: 0 10px 0 0 !important;
}

.previewImg{
  width: 100%;
}

.btnAdd{
    margin-top: 5px;
  }
</style>
